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Most probably with the host name the "wwwroot"wwwroot folder path would have also changed and some of the files in the "sitecore" folder would be missing. Try

Try replacing the "sitecore"sitecore folder (C:\inetpub\wwwroot\yourSitecore\Website\sitecoreC:\inetpub\wwwroot\yourSitecore\Website\sitecore) with the one working properly or from the installablesinstallable archives. If this doesn't work try verifying the files in App_Config folder.

Most probably with the host name the "wwwroot" folder path would have also changed and some of the files in the "sitecore" folder would be missing. Try replacing the "sitecore" folder (C:\inetpub\wwwroot\yourSitecore\Website\sitecore) with the one working properly or from the installables. If this doesn't work try verifying the files in App_Config folder.

Most probably with the host name the wwwroot folder path would have also changed and some of the files in the "sitecore" folder would be missing.

Try replacing the sitecore folder (C:\inetpub\wwwroot\yourSitecore\Website\sitecore) with the one working properly or from the installable archives. If this doesn't work try verifying the files in App_Config folder.

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Most probably with the host name the "wwwroot" folder path would have also changed and some of the files in the "sitecore" folder would be missing. Try replacing the "sitecore" folder (C:\inetpub\wwwroot\yourSitecore\Website\sitecore) with the one working properly or from the installables. If this doesn't work try verifying the files in App_Config folder.